System of electrical distribution.



E. THOMSON.

SYSTEM OF ELECTRICAL DISTRIBUTION APPLICATION FILED MAPUH. 1905 Patented Aug. 29, 1911'.

Witnesses;

invenior- '7. The combination of a source of currenfi, plurality of mercury vapor devices having, a high initial resistance, means receiving current from said source for starting each of said devices While the voltage impressed on each device is higher than the normal opersh'ng' vollege but lower than the full voltage of said source, and means for 0011' meeting said device in series on said source.

8, The combinetion'of a source of -current, a luralii'y of mercury vapor devices,

means for impressing a relatively high voltage on each of said devices to start the same and automatic means for subsequently disposing said devices in. series on said source.

In Witness whereof I have hereunto set my hand (his eighth day of March, 1905;

ELIHU THOMSON. Witnesses JOHN A. MeMANUg-Jn, HENRY O. FESTENDABFI; 

